820-2936 that has about 0.3v in SMC_BC_ACOK

[Salvatore951]

Good morning, I have a 820-2936 that has about 0.3v in SMC_BC_ACOK, is smc dead or u7000?

 

[dukefawks]

First the basic voltages on U7000. Is DCIN present is 3V42 even present?

 

[Salvatore951]

it's present, heating SMC area the board started to work again, so I supposed it was a dead smc. I replaced the smc and still same problem. Boards boot only heating smc area

 

[dukefawks]

Pull up resistor on ACOK line bad?

 

[Salvatore951]

please, can you tell which resistor should I check? r6929 is 2k

 

[Salvatore951]

when smc area cools down magsafe light turns off

 

[Salvatore951]

problem solved, thanks you.

 

[Salvatore951]

Sorry problem not solved. smc_BC_ACOK is 1.4v instead of 3v. chgr_ACIN is present, already replaced u7000 2 times. If I press with a finger under u7000 area boards boots even if smc_BC_ACOK is low

 

[dukefawks]

Value of R5087 and resistance to GND on the ACOK line?